What did Rex do to "pay Jeanette back" for the twenty dollars she gave him?

He took her to a bar and won eighty dollars playing pool. While there, he also sat back and watched while the men in the bar made inappropriate advances toward his daughter..... going so far as to condone their behavior.

"Aw, come on," he said and shouted at Dad, "I'm going to take your girl upstairs."
"Sure," Dad said. "Just don't do anything I wouldn't do." He pointed his pool cue at me. "Holler if you need me," he said and winked at me as if to say he knew I could take care of myself, that this was just a part of my job.